@appsemble/node-utils/csv.js

NodeJS utilities used by Appsemble internally.

export const preProcessCSV = (instance, key, schema, options, ctx) => {
    // CSV is parsed into an array of flat objects. This means all instances are a direct descendant
    // of the root array and the path length is 1.
    if (ctx.path.length !== 1) {
        return;
    }
    const parent = instance;
    const value = instance[key];
    switch (schema.type) {
        case 'null':
            if (value === 'null') {
                parent[key] = null;
            }
            break;
        case 'boolean':
            if (value === 'true') {
                parent[key] = true;
            }
            else if (value === 'false') {
                parent[key] = false;
            }
            break;
        case 'integer': {
            const result = Number(value);
            if (Number.isInteger(result)) {
                parent[key] = result;
            }
            break;
        }
        case 'number': {
            const result = Number(value);
            if (Number.isFinite(result)) {
                parent[key] = result;
            }
            break;
        }
        case 'array': {
            const result = JSON.parse(value || '[]');
            if (Array.isArray(result)) {
                parent[key] = result;
            }
            break;
        }
        case 'object': {
            const result = JSON.parse(value);
            if (result && typeof result === 'object') {
                parent[key] = result;
            }
            break;
        }
        default:
            break;
    }
};
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